Carburetor



G. W. STORCH Dec. 29,1925- CARBURETOR- Filed May 17, 1924 V Patented Dec. 29, 1925.

UNITED STATES PATENT ()FFICE.

GEORGE W. STORCH, OF APPLETON, WISCONSIN.

CARBURETOR.

Application filed May 17,

1 '0 all whom it may concern:

Be it known that I, GEORGE Santana, a citizen of the United States, and resident of Appleton, in the county of Outagamie and State of lVisconsin, have invented certain new and useful Improvements in Carburetors; and I do hereby declare that the following is a full, clear, and exact description thereof.

This invention relates to carburetors.

In carburetors as heretofore constructed means have been provided for constricting the flow of air about the nozzle when the engine is runnin at low speed so as to maintain the requisite suction upon the nozzle. These means, however; have been found defective as they frequently stick at either their upper or lower limits of travel and quickly produce a jerky and unreliable operation.

This invention is designed to overcome the above noted defects, and objects of such invention are to provide a carburetor in which means are provided for automatically constricting the air passage adjacent the nozzle when the engine is running at low speed and to so construct this constricting means and associate it with the other portions of the carburetor that sticking is wholly avoided either at the upper or lower limit of travel of the constricting means.

Further objects are to provide a simple type of carburetor in which an apertured disk is employed to automatically constrict the flow of air under predetermined conditions and is so formed that it may be 1positioned within the carburetor with eit er face uppermost and will work with equal ease in either position without any danger of sticking.

A further object is to generally simplify and improve the construction of carburetors.

An embodiment of the invention is shown in the accompanying drawings, in which Figure 1 is a vertical sectional view through the carburetor showing the disk in its lowermost position.

Figure 2 is a plan View of the disk removed from the remaining portion of the carburetor.

Figure 3 is a sectional view on the line 38 of Figure 1.

The carburetor comprises a lower section 1 and an upper section 2. This lower section is provided with an air inlet passage 2 and the upper section is provided with drical contour within which an upwardly extending nozzle 10 is centrally mounted. This nozzle communicates by means of a passage or neck 11 with the float chamber and is controlled by a needle valve 12 whose stem 13 projects through a suitable packing in the upper chamber and is provided with a manipulating handle.

It is to be noted that the upper casing or section 2 is provided with a downturned flange 14:, and it is further to be noted that the nozzle 10 is provided with an outwardly projecting circular ledge 15 spaced downwardly from the flange 14:, as shown in Figure 1. A butterfly control valve 16 is mounted in the outlet 3 and a butterfly choke valve 17 is mounted in the inlet 2. It is to be noted from Figure 1 that the two sections are held together by means of screws 18 and that a small flanged portion 19 is provided in the upper section which fits within the float chamber 4 and accurately centers the parts. H0wever this centering is also secured by the cooperation of the flange 14 of the upper section with the wall 20 of the air passage 9.

The means for automatically controlling the flow of air and constricting the air passage when the engine is running slowly, may comprise a disk indicated generally at This disk is provided with an apertured hub portion 22 provided with upper and lower bosses 23. It is provided with an annular marginal portion 24. This marginal portion is provided with pins 25 which project above and below the upper and lower surfaces thereof. It is to be noted that the hub 22 is provided with inwardly directed lugs 26 which contact with the cylindrical exterior surface of the nozzle 10,' and insures free sliding of the disk upon such nozzle. This disk 21 is provided with a plurality of apertures 27 which are uniformly spaced between the marginal and hub portions of the disk. I

In operation the disk is raised by the flowing air when the engine is operating uniii) der normal or full load conditions and the projecting pins contact with the flange 14 when the disk is in its most elevated position. The pins, however, hold the body of the disk from actual contact with the flange and thus prevent sticking. lVhen, however, the engine is running at slow speed, the disk assumes the low position, as shown in Figure 1, and the boss 23 on the low side rests upon the ledge 15 and prevents the body of the di k from contacting with such ledge, consequently preventing sticking.

In View of the small surfaces in contact with the nozzle, that is to say, the lugs 26, the disk will not stick to the nozzle but will freely slide thereon at all times.

It is to be noted that when the disk is in its lowermost position that the ledge 15 par tially closes the apertures 27 and constricts the air passage thus insuring adequate suction upon the nozzle.

It is to be noted that the nozzle projects a distance above the fuel level in the float chamber and consequent y the flow automatically ceases when the engine is stopped. Further the nozzle is located in a free space in the air passage and consequently the air will freely sweep by the nozzle and atomize any overflow of gasoline or fuel that may be sucked through the nozzle.

It will be seen that an extremely simple type of carburetor has been provided in which automatic means are employed for controlling the suction exerted upon the nozzle in accordance with the flow of air through the carburetor.

It will be noted also that in the practice of this invention, sticking of the disk is wholly prevented under all conditions of operation.

Although the invention has been described in considerable detail, it is to be understood that the invention may be variously embodied and is, therefore, to be limited only as claimed.

I claim:

l. In a carburetor the combination of an air passage, a nozzle therein, a ledge formed upon said nozzle, an apertured disk slidably carried by said nozzle and cooperating with said ledge to partially close the apertures in said disk when said disk is closed to said ledge, the marginal edge of said disk being in close proximity to, and out of contact with, the walls of said passage, said disk having a small boss adapted to contact with said ledge when said disk is in its lowest position, said pas e having an inwardly projecting should r, and pins carried by said disk and adapted to contact with said shoulder when said disk is in its uppermost position.

2. In a carburetor the combination of an air passage, a nozzle therein, said air passage having an upper shoulder, a ledge formed upon said nozzle and spaced from said shoulder, and an apertured disk slidably carried by said nozzle and cooperating with said ledge to partially close the apertures in said disk when said disk is close to said ledge, the marginal edge of said disk being in close proximity to and out of contact wit-h the walls of said passage, said disk having a hub provided with a small boss adjacent its center projecting from each side thereof and having pins adjacent its margin projecting from each side thereof and adapted to contact with said shoulder, said disk having ribs on the inner side of said hub forming the only portion of said disk in contact with said nozzle.

In testimony that I claim the foregoing I have hereunto set my hand at Appleton, in the county of Outagamie and State of Wisconsin.

GEORGE W. STORCH. 

